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| author | Alon Zakai <azakai@google.com> | 2019-09-04 10:26:45 -0700 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2019-09-04 10:26:45 -0700 |
| commit | 3ac5416a6b070096fcd26c94fcdb7c0c144c72b4 (patch) | |
| tree | 7d19c947643a42499136aa05b4110c11369b4fe0 /test | |
| parent | 86507ab974542a7ac7a9e9e127321622025e3795 (diff) | |
| download | binaryen-3ac5416a6b070096fcd26c94fcdb7c0c144c72b4.tar.gz binaryen-3ac5416a6b070096fcd26c94fcdb7c0c144c72b4.tar.bz2 binaryen-3ac5416a6b070096fcd26c94fcdb7c0c144c72b4.zip | |
Add an option for the PostEmscripten pass to set the sbrk ptr location (which is called DYNAMICTOP_PTR in emscripten) (#2325)
The assumption is that an import env.emscripten_get_sbrk_ptr exists, and we replace the value returned from there with a constant. (We can't do all this in wasm-emscripten-finalize, as it happens before the JS compiler runs, which can add more static allocations; we only know where the sbrk ptr is later in compilation.) This just replaces the import with a function returning the constant; inlining etc. can help more later.
By setting this at compile time we can reduce code size and avoid importing it at runtime, which makes us more compatible with wasi (less special imports).
Diffstat (limited to 'test')
| -rw-r--r-- | test/passes/post-emscripten_pass-arg=emscripten-sbrk-ptr@4008.txt | 8 | ||||
| -rw-r--r-- | test/passes/post-emscripten_pass-arg=emscripten-sbrk-ptr@4008.wast | 5 |
2 files changed, 13 insertions, 0 deletions
diff --git a/test/passes/post-emscripten_pass-arg=emscripten-sbrk-ptr@4008.txt b/test/passes/post-emscripten_pass-arg=emscripten-sbrk-ptr@4008.txt new file mode 100644 index 000000000..4b8da86cd --- /dev/null +++ b/test/passes/post-emscripten_pass-arg=emscripten-sbrk-ptr@4008.txt @@ -0,0 +1,8 @@ +(module + (type $FUNCSIG$i (func (result i32))) + (func $internal (; 0 ;) (type $FUNCSIG$i) (result i32) + (i32.const 4008) + ) +) +(module +) diff --git a/test/passes/post-emscripten_pass-arg=emscripten-sbrk-ptr@4008.wast b/test/passes/post-emscripten_pass-arg=emscripten-sbrk-ptr@4008.wast new file mode 100644 index 000000000..8e5a610b2 --- /dev/null +++ b/test/passes/post-emscripten_pass-arg=emscripten-sbrk-ptr@4008.wast @@ -0,0 +1,5 @@ +(module + (import "env" "emscripten_get_sbrk_ptr" (func $internal(result i32))) +) +(module +) |